teich



E. L. TEICH.

LOCK.

APPLrcATloN FILED MAR. 24. 1916.

2, SHEETS-SHEET l.

Patented Aug. 22, 1916.

E. L. TEICH.

LOCK'. APPLICATION FILED MAII.24, I9I6.

Patented Aug. 22, 1916 2 SHEETS-SHEET 2.

E sTATs ERNEST n TEICH, OE NEW BRITAIN, CONNECTICUT,` AssIGNoR To THE AMERICAN HARDWARE CORPORATION, or NEW BRITAIN, CONNECTICUT, A CORPORATION OE- CONNECTICUT.

LOCK.

citizen of the. United States, residing .atv

New Britain, county of Hartford, State of Connecticut, have invented a certain lnew and useful Improvement in Locks, of Which' the following is a full, clear, and exact description.

My invention relates to improvements in locks, and has for its obJect to provide the external knob of the lockwith a secret releasing member so that one unfamiliar with that classl of locks would not [naturallyl release the mechanism, so as to be unable to unlatch the door upon grasping the knob in the manner in which knobs are ordinarily grasped.

My invention is applicable to locks and f latches of various types and can be einbodied to advantage in locks having variousmeans for dogging the latch and also to control means for retracting the latch which cannot be dogged.

I have embodied my invention in a lock of the type shown in patent to Byron Phelps, No. 834,994, granted November 6,

y 1906, and it possesses some especial advantages when embodied in such a lock.

- The following is a description of an embodiment of my invention, reference being had to the accompanying drawings, in which:

. Figure lshows the` plan view of a lock;

Fig. 2 shows a part of the frame and es-V cutcheonl of the lock and the knob, partly in section on the line corresponding to the axis of the knobs Fig. y l with my secret Vholding and releasing meansin engaging position; Fig. 3 isa similar view with my holding and releasing means in retracted position; Fig. 4 shows an end elevation of l the knob removed from the spindle and with 4the secret catch member' removed; Fig. 5 shows an end'elevation of a proJection from the lock frame, showing notches with which the catch member engages; Fig. 6 shows in end and sideelevation the engaging catch member-of my secret holding and releasing means. Fig. 7 is a partial horizontal section with the side. plates omitted showing the dogging means. Fig. 8 is a'partial vertical section for the same purpose. Fig. 9 is a side and end elevation of the dog controlling means. i 4

Referring more particularly to the draw- Specicatioii of Letters Patent.

Patented Aug. 221, 191e.

Application led 'March 24, 1916. Serial No. 86,392.

ings, which for convenient use or illustraby the knob7 or by the key 8 under all cir` cuinstances. When the roll-back 5 is in the position shown, it can be actuated by the knob 9. The roll-back 5, however, can be moved .to the left so as to engage or enter a recess in the lock frame, this being accomplished by the turning of the ring 10.. When the roll-back is in this position the latch bolt 3 is dogged against operation by the knob 9, although the latch bolt 3 can be retracted through the roll-back 5 either bv the knob 7 or key 8. The key controlled means acts to turn the inside knob. These features are clearly described in the Phelps Patent No. 834,994, above referred to. Reference is made to that patent for further description of the elements just referred to and their operation. It is to be notedl that the outside knob 9 can be dogged or undogged against the operation of the latch 3. p

Sneak thieves, and other persons, often try outside knobs to see whether they are though that may not really be the case. In

order to accomplish this result I surround the spindle vof the knob 9 With a sleeve 11 having one or more projections 12,Which engage'recesses 13 in the knob, whatever may be the position of the sleeve 1l. I also provide in the knob` chambers 14 for springs 15 which normally press the sleeve 11 away from the knob and toward the frame of the lock. Upon an extension from the frame of the lock I provide notches 16-16 with which the projections 12 upon the sleeve 11 engage when the sleeve is forced toward thel lock frame and the knob 9 is in a position to permit the latch 3 to be extended.

The mechanism controlled by the4 ring 10 for dogging the outer knob is shown in detail in Figs. 7, 8 and 9. The ring 10 is provided with a cam surface 17, which engages a pin 18 moving in a longitudinal slot in the knob shank and carried by the longitudinal rod 19 against the right hand end of which bears a spring 20. To this rod 19 the rollback 5 is secured so that it is free to rotate but Whenever the rod 19 is moved longitudi# nally in either direction the roll-back 5 travels with it. The roll-back 5 surrounds the rod 19 and is not affected or controlled thereby. VBoth of these roll-backs lie in notches '21 formed on the inner opposing ends of the Shanks of the knobs 7 and 9.

` The frame of the lock is provided With a notch 22, into and out of which the roll` back'5 can be moved by the rod 19. When the roll-back 5 is in the notch 22, the knob 9 is thereby locked against turning. When it is removed from said notch 22, the knob 9 can be tu'rned so as to retract the latch 3. The rod 19 is adjusted by the cam ring 10. When this ring is turned to the position shown in Fig. 8, so that the 10W part of the cam is in line with the pin 18, the spring 2() c pushes the rod 19 to the left so as to move v25 the roll-back 5 `into the notch 22 and thus knob 9.

Fig. 2 shows the latch member 11 with the v projections 12 engaging the notches 16. .With the parts in this position, when the knob 9 is grasped in the ordinary manner, it

is .held'against :turning Without regard to whether itis dogged or not. If, however,

the knob is grasped so that the fingers eX- tend to therear thereof, the sleeve 11 can be easily retracted to the position shown in Fig. 3, at Which time the knob 9 if undogged `can be turned so as to Withdraw the latch 3.

By this means described a very simple and inconspicuous secret detent is provided,

which Will prevent anyone turning the outside knob of a lock unless they WithdraviT the secret detent, a thing which they are not likely to do unless they are aware of its presence. This secret detent provides means 0 giving the impression that the outside knob is dogged even when that is not the case.

As Will be evident, my secret detent may be applied to knobs that cannot be dogged and thus give the impression that a door is really locked when there is no lockupon it, but only a simple latch. The best results are accomplished, however, when 'the lock upon which my device is used is upon a door Which ordinarily would or might be dogged.

As will be evident to those skilled in the art, my invention permits of various modifications Without departing from the spirit thereof, or the scope of the appended claims.

What I claim is:

1. In combination, a latch, a latch frame therefor, an outside knob and/roll-back for retracting said latch, a detent accessible from the same side as said knob for .holding said knob from rotation relative to said frame so that it cannot actuate said roll-back, saidl detent .when in holding position engaging both said knob and a stationary portion connected to said latch frame, and means normally tending to force said detent member into engagement with said frame, said detent being' manually operable from the outside of the door, and an inside knob rotatable independently of said outside knob for retracting said latch.

2. In combination, a latch, a latch frame therefor, a knob and roll-back for retracting said latch, a detent carried by said knob for holding said knob from rotation relative to said frame, said detent When in holding position engaging both said knob and a sta- 35 tionary portion connected to said latch frame, and meansnorrnally tending to force said detent into engagement With said frame, said detent forming a sleeve surrounding the spindle of said knob. Y

3. In combination, a latch,y a latch frame therefor, a knob and roll-'back for retracting said latch, a. detent carried by said knob for holding said knob from rotation relative to said frame, said detent when in holding position engaging both said vknob and a stationary portion connected to said latch frame, and means normally tending/to i force said detent into engagement With saidy frame, said detent forming a sleeve sur.- rounding the spindle of said knob, said knob having a recess partially receiving said sleeve.

4. In combination, a latch, a latch frame therefor, an outside knob and roll-back for retracting said latch, a detent carried by said knob for holding said knob from rotation relative to said frame, said detent When in holding position engaging both said knob and a stationary portion connected to said latch frame, means normally tending to force said detent into engagement With said frame, and additional means for dog# ging said knob so that it cannot retract said latch, said additional means being inaccessiblev from the outside Whenthe latch is attached toga door.

5. In combination, a latch, a latch frame therefor, an. outside knob and roll-back for retracting saidlatch, a detent carried by` said knob for holding said knob from rotation relative to said frame, said detent When in holding position engaging both said knob and a stationary portion connected to said latch frame, means for normally tending to force said detent into engagement with said frame, additional means for dogging said knob so that it cannot retract said latch, said additional means being inaccessible vfrom the outside when .said latch is attached to a door, and key-controlled means for retracting said latch bolt from the outside independently of thegposition of said detent.

6. In combination, a latch, a latch frame therefor, an outside knob and roll-back for retracting` said latch, a detent carried by said knob for holding said knob from rotation relative to said frame, said detent when in holding position engaging lboth said knob and a stationary portion connected to said latch frame, means for normally tending to force said detent into engagement With said frame, additional means for dogging said knob so that it cannot retract said latch, said additional means being inaccessible from the outside when said latch is attached to a door, key-controlled means for'retracting said latch bolt from the outside independently ofthe position of said detent, and an inside means for retracting said latch bolt independently of the position of said detent.

holding position engaging both said knob and a stationary portion connected'to said latch frame, means for normally tending to force said detent into engagement with said stationary portion, additional means for clogging said knob so 4that it cannot retract said latch,

said additionalmeans being inaccessible from the outside When said latch is attached to a key controlled means for retracting said latch bolt from the outside independently of the position of said detent, and an inside knob for retracting saidv latch bolt independently of the position of said detent, the key controlled means accessible from the outside of the door acting to turn `said in side knob.

ERNEST L. TEICH. 

